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Taxes - Summary of Reconciliation of Effective and Applicable Income Tax Expenses (Detail) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Disclosure Of Reconciliation Of Effective And Applicable Income Tax Expenses [Line Items]    
Profit before tax $ 2,310 $ 2,828
PRRT expense 192 778
Income tax expense 146 284
Income Tax [Member]    
Disclosure Of Reconciliation Of Effective And Applicable Income Tax Expenses [Line Items]    
Reduction in deferred tax liability due to held for sale basis (91) 0
Profit before tax 2,310 2,828
PRRT expense (192) (778)
Profit before income tax 2,118 2,050
Income tax expense calculated at 30% 635 615
Effect of tax rate differentials (15) 30
Effect of deferred tax assets not recognised 35 67
Effect of tax benefits previously unrecognised (366) (340)
Foreign exchange impact on tax benefit (11) (83)
Adjustment to prior years (52) (16)
Other 11 11
Income tax expense $ 146 $ 284